Use synthetic division to divide 2x^3-3x^2+4x-1 by 2x+1.
2x^3-3x^2+4x-1
=(2x^2-4x+6)(x+1/2)- 4
=(x^2-2x+3)(2x+1)- 4 <---點解(x+1/2)會變返(2x+1)?背後原因&Step 係咩??
thanks
更新1:
(x+1/2)會變返(2x+1)...係因為想將個divisor變返(2x+1)定係因為唔accept分數,所以通分母??